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//===-- IntelPTCollector.h ------------------------------------ -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_IntelPTCollector_H_
#define liblldb_IntelPTCollector_H_
#include "IntelPTMultiCoreTrace.h"
#include "IntelPTPerThreadProcessTrace.h"
#include "IntelPTSingleBufferTrace.h"
#include "Perf.h"
#include "lldb/Host/common/NativeProcessProtocol.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/TraceIntelPTGDBRemotePackets.h"
#include "lldb/lldb-types.h"
#include <linux/perf_event.h>
#include <sys/mman.h>
#include <unistd.h>
namespace lldb_private {
namespace process_linux {
/// Main class that manages intel-pt process and thread tracing.
class IntelPTCollector {
public:
/// \param[in] process
/// Process to be traced.
IntelPTCollector(NativeProcessProtocol &process);
static bool IsSupported();
/// To be invoked as soon as we know the process stopped.
void ProcessDidStop();
/// To be invoked before the process will resume, so that we can capture the
/// first instructions after the resume.
void ProcessWillResume();
/// If "process tracing" is enabled, then trace the given thread.
llvm::Error OnThreadCreated(lldb::tid_t tid);
/// Stops tracing a tracing upon a destroy event.
llvm::Error OnThreadDestroyed(lldb::tid_t tid);
/// Implementation of the jLLDBTraceStop packet
llvm::Error TraceStop(const TraceStopRequest &request);
/// Implementation of the jLLDBTraceStart packet
llvm::Error TraceStart(const TraceIntelPTStartRequest &request);
/// Implementation of the jLLDBTraceGetState packet
llvm::Expected<llvm::json::Value> GetState();
/// Implementation of the jLLDBTraceGetBinaryData packet
llvm::Expected<std::vector<uint8_t>>
GetBinaryData(const TraceGetBinaryDataRequest &request);
/// Dispose of all traces
void Clear();
private:
llvm::Error TraceStop(lldb::tid_t tid);
/// Start tracing a specific thread.
llvm::Error TraceStart(lldb::tid_t tid,
const TraceIntelPTStartRequest &request);
/// \return
/// The conversion object between TSC and wall time.
llvm::Expected<LinuxPerfZeroTscConversion &>
FetchPerfTscConversionParameters();
/// The target process.
NativeProcessProtocol &m_process;
/// Threads traced due to "thread tracing"
IntelPTThreadTraceCollection m_thread_traces;
/// Only one instance of "process trace" can be active at a given time.
/// It might be \b nullptr.
IntelPTProcessTraceUP m_process_trace_up;
};
} // namespace process_linux
} // namespace lldb_private
#endif // liblldb_IntelPTCollector_H_
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